CN101988804B - Device and method for drying blast furnace ores and coke groove by recycling residual heat of circular cooler - Google Patents
Device and method for drying blast furnace ores and coke groove by recycling residual heat of circular cooler Download PDFInfo
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- CN101988804B CN101988804B CN2010105806139A CN201010580613A CN101988804B CN 101988804 B CN101988804 B CN 101988804B CN 2010105806139 A CN2010105806139 A CN 2010105806139A CN 201010580613 A CN201010580613 A CN 201010580613A CN 101988804 B CN101988804 B CN 101988804B
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Abstract
The invention relates to a device and method for drying blast furnace ores and a coke groove by recycling residual heat of a circular cooler. The device comprises a sintering area and a blast furnace area, and the sintering area and the blast furnace area are communicated though a draught fan. In the method, heat exhaust gas controlled at a certain temperature is introduced into the coke groove and a lump ore groove through technological means, and the optimal drying effect is realized through circulated induced draft. The invention has less investment which is one fourth of residual electricity generating investment; the device is convenient to operate; various valves do not need to be regulated any more basically after being debugged so long as some instruments need to be monitored such as hot-blast temperature and the like; only devices are started or stopped under normal conditions; and the device is simple to maintain, and has good charcoal drying effect.
Description
Technical field
The present invention relates to the apparatus and method that a kind of central cooler waste heat recovery is used for Blast Furnace Ore, the oven dry of burnt groove.
Background technology
It is at present domestic that recycling mainly contains several kinds of approach: 1, hot gas sintering to sintered ring cold exhaust heat; 2, direct preheating compound; 3, recovery waste heat steam; 4, as combustion air; 5, reclaim high-temperature steam and be used for generating; 6, utilize waste heat recovery hot water, the strengths and weaknesses analysis of these several kinds of approach is following:
1) hot gas sintering
The most outstanding advantage of hot gas sintering is exactly whole physics sensible heats that can make full use of central cooler waste gas; But hot gas sintering also has shortcoming; Mainly be the sinter bed suction hot blast temperature than normal temperature air general high 150 ℃～300 ℃, respective volume will increase by 50%～100%, equals to get into the sinter bed air quantity and reduces; Along with the minimizing of air quantity, sintering deposit output also can reduce.
2) direct preheating compound
The direct preheating compound of hot blast; Improve mixture temperature, have part small enterprise once to adopt, cause easily that moisture evaporates in a large number in the compound but hot blast directly feeds compound; Water evaporates can cause temperature to reduce; Offset most of heats, caused mixture moisture inhomogeneous easily, in addition so there be limited evidence currently of is seen employing.
3) recovery waste heat steam
Central cooler hot waste gas hot pipe technique capable of using reclaims heat and produces steam, is mainly used in preheating of mixed material, heating, bathing etc.But, seldom can get into steam pipe system because sintering recovery waste heat steam pressure and temperature are generally lower; The enterprise's steam that has is used for the preheating compound, also because of add in the mixer steam energy utilization rate too low, in the groove of ore deposit, add steam, though can make full use of steam gasification heat, but utilize effect not ideal because of a large amount of condensations of steam are prone to cause mixture moisture fluctuation.
4) the cold and hot wind of ring is as combustion air
Utilize the combustion air of the cold and hot wind replacement point firearm of ring can make full use of the heat energy in the waste gas, can practice thrift coal gas but its use amount well below the generation of central cooler hot blast;
5) reclaim high-temperature steam and be used for generating
In recent years sintered ring cold exhaust heat being used for generating has become trend of the times, in, the reduction of low temperature parameter steam turbine cost, also make the construction in the sintering waste heat power station safety, economic, reliable that becomes.Present most of enterprise all adopts this heat recovery technology, but investment is higher relatively.Invest 2.14 hundred million yuan like Wuhan Iron and Steel Plant and build up 3 * 435m2 sintering waste heat generating system.
6) utilize waste heat recovery hot water
The sintering circular-cooler waste heat also can use simplified heat-exchanger to produce hot water, and hot water can be used for mixer and adds water, quicklime slaking, heating, bathing etc.
7) utilize the burnt groove in exhaust gas of hot-blast stove preheating ore deposit, this technology and the cold UTILIZATION OF VESIDUAL HEAT IN technology type of ring seemingly but lack security because of containing coal gas in the exhaust gas of hot-blast stove.
Summary of the invention
Technical problem to be solved by this invention provides the apparatus and method that a kind of central cooler waste heat recovery is used for Blast Furnace Ore, the oven dry of burnt groove, to enhance productivity, reduces production costs.
The technical solution adopted for the present invention to solve the technical problems is: the device that provides a kind of central cooler waste heat recovery to be used for Blast Furnace Ore, the oven dry of burnt groove, comprise sintering zone and blast furnace zone, and it is characterized in that:
Described sintering zone comprises sintering circular-cooler, multicyclone, temperature detecting point, the first mixer selector valve door, first blower fan and pressure detecting point; Sintering circular-cooler is communicated with cyclone dust collectors; The outlet of cyclone dust collectors is communicated with the inlet scoop of first blower fan; And place, the inlet scoop of first blower fan also is equipped with first mixer selector valve door and the temperature detecting point; The air outlet of first blower fan links to each other with the import of No. 1 blast furnace, bypass pipe, No. 2 blast furnaces and first chimney respectively through valve, and the inlet parallel of No. 1 blast furnace, bypass pipe, No. 2 blast furnaces and first chimney;
The blast furnace zone comprises blast furnace No. 1, No. 2 blast furnaces, bypass pipe, burnt groove, lump ore groove and deduster; No. 1 blast furnace, No. 2 blast furnaces all link to each other with deduster through the second mixer selector valve door with bypass pipe; Parallelly connected successively burnt groove between No. 1 high outlet of still and the deduster import, the lump ore groove; Parallelly connected successively burnt groove between No. 2 high outlet of stills and the deduster import, the lump ore groove; The deduster outlet connects second blower fan and second chimney successively.
Between the air outlet of described first blower fan and No. 1 blast furnace, bypass pipe and No. 2 blast furnaces the pressure detecting point is installed all.
The central cooler waste heat recovery is used for the method for Blast Furnace Ore, burnt groove oven dry, may further comprise the steps:
1) with temperature be 200 ℃-300 ℃ the hot waste gas of sintering circular-cooler through the cyclone dust collectors dedusting,
2) the first blower fan air output is controlled to be 300,000 m
3/ h see that then the hot waste gas after the dedusting is sent into blast furnace, bypass pipe and No. 2 blast furnaces No. 1 through first blower fan, and the air output of No. 1 blast furnace, bypass pipe and No. 2 blast furnaces is controlled at 150,000 m respectively
3/ h, 200,000 m
3/ h and 150,000 m
3/ h;
3) in burnt groove and lump ore trench bottom awl section lead-ingroove, each groove oven dry is controlled at 7000Nm with flue gas flow to the hot waste gas of No. 1 blast furnace and No. 2 blast furnaces respectively
3/ h;
4) go into the groove hot waste gas,, carry out a series of heat exchange with coke, ore through bed of material gap in 8 meters the groove, thus with coke, ore in the groove with the part mechanical water take out of.
Each burnt groove of described step 3) and step 4) and lump ore groove top all are provided with 2 thermometrics, temperature in the groove implement are detected, when temperature in the groove is higher than 170 ℃ of setting values, at blast furnace master-control room display alarm signal.
Beneficial effect
Advantage of the present invention is following:
One, reduced investment: compare with cogeneration investment, this investment be merely its 1/4th.
Two, easy to operate: various valves need not adjust after debugging is accomplished basically again, just some instrument such as hot blast temperature etc. are kept watch on getting final product, and normally only equipment are carried out the start-stop operation.
Three, safeguard simply: do not have the special maintenance requirement, safeguard by normal blower fan, deduster to get final product.
Four, charcoal good drying effect, the blast furnace feeding coke moisture is stable, and it is stable to help the blast furnace heat.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
As shown in Figure 1, a kind of central cooler waste heat recovery is used for the device of Blast Furnace Ore, the oven dry of burnt groove, comprises sintering zone and blast furnace zone, it is characterized in that:
Described sintering zone comprises sintering circular-cooler, multicyclone, temperature detecting point, the first mixer selector valve door, first blower fan and pressure detecting point; Sintering circular-cooler is communicated with cyclone dust collectors; The outlet of cyclone dust collectors is communicated with the inlet scoop of first blower fan; And place, the inlet scoop of first blower fan also is equipped with first mixer selector valve door and the temperature detecting point; The air outlet of first blower fan links to each other with the import of No. 1 blast furnace, bypass pipe, No. 2 blast furnaces and first chimney respectively through valve, and the inlet parallel of No. 1 blast furnace, bypass pipe, No. 2 blast furnaces and first chimney;
The blast furnace zone comprises blast furnace No. 1, No. 2 blast furnaces, bypass pipe, burnt groove, lump ore groove and deduster; No. 1 blast furnace, No. 2 blast furnaces all link to each other with deduster through the second mixer selector valve door with bypass pipe; Parallelly connected successively burnt groove between No. 1 high outlet of still and the deduster import, the lump ore groove; Parallelly connected successively burnt groove between No. 2 high outlet of stills and the deduster import, the lump ore groove; The deduster outlet connects second blower fan and second chimney successively.
Between the air outlet of described first blower fan and No. 1 blast furnace, bypass pipe and No. 2 blast furnaces the pressure detecting point is installed all.
The central cooler waste heat recovery is used for the method for Blast Furnace Ore, burnt groove oven dry, may further comprise the steps:
1) with temperature be 200 ℃-300 ℃ the hot waste gas of sintering circular-cooler through the cyclone dust collectors dedusting,
2) the first blower fan air output is controlled to be 300,000 m
3/ h see that then the hot waste gas after the dedusting is sent into blast furnace, bypass pipe and No. 2 blast furnaces No. 1 through first blower fan, and the air output of No. 1 blast furnace, bypass pipe and No. 2 blast furnaces is controlled at 150,000 m respectively
3/ h, 200,000 m
3/ h and 150,000 m
3/ h;
3) in burnt groove and lump ore trench bottom awl section lead-ingroove, each groove oven dry is controlled at 7000Nm with flue gas flow to the hot waste gas of No. 1 blast furnace and No. 2 blast furnaces respectively
3/ h;
4) go into the groove hot waste gas,, carry out a series of heat exchange with coke, ore through bed of material gap in 8 meters the groove, thus with coke, ore in the groove with the part mechanical water take out of.
Each burnt groove of described step 3) and step 4) and groove top, ore deposit all are provided with 2 thermometrics, temperature in the groove implement are detected, when temperature in the groove is higher than 170 ℃ of setting values, at blast furnace master-control room display alarm signal.
Claims (4)
1. a central cooler waste heat recovery is used for the device of Blast Furnace Ore, the oven dry of burnt groove, comprises that sintering zone and blast furnace are regional, it is characterized in that:
Described sintering zone comprises sintering circular-cooler, multicyclone, temperature detecting point, the first mixer selector valve door, first blower fan and pressure detecting point; Sintering circular-cooler is communicated with multicyclone; The outlet of multicyclone is communicated with the inlet scoop of first blower fan; And place, the inlet scoop of first blower fan also is equipped with first mixer selector valve door and the temperature detecting point; The air outlet of first blower fan links to each other with the import of No. 1 blast furnace, bypass pipe, No. 2 blast furnaces and first chimney respectively through valve, and the inlet parallel of No. 1 blast furnace, bypass pipe, No. 2 blast furnaces and first chimney;
The blast furnace zone comprises blast furnace No. 1, No. 2 blast furnaces, bypass pipe, burnt groove, lump ore groove and deduster; No. 1 blast furnace, No. 2 blast furnaces all link to each other with deduster through the second mixer selector valve door with bypass pipe; Parallelly connected successively burnt groove between No. 1 high outlet of still and the deduster import, the lump ore groove; Parallelly connected successively burnt groove between No. 2 high outlet of stills and the deduster import, the lump ore groove; The deduster outlet connects second blower fan and second chimney successively.
2. a kind of central cooler waste heat recovery according to claim 1 is used for the device of Blast Furnace Ore, the oven dry of burnt groove, it is characterized in that: between the air outlet of described first blower fan and No. 1 blast furnace, bypass pipe and No. 2 blast furnaces the pressure detecting point is installed all.
3. utilize the described device of claim 1 that the central cooler waste heat recovery is used for the method for Blast Furnace Ore, burnt groove oven dry, may further comprise the steps:
1) with temperature be 200 ℃-300 ℃ the hot waste gas of sintering circular-cooler through the multicyclone dedusting,
2) the first blower fan air output is controlled to be 300,000 m
3/ h, the hot waste gas after the dedusting is sent into blast furnace, bypass pipe and No. 2 blast furnaces No. 1 through first blower fan then, and the air output of No. 1 blast furnace, bypass pipe and No. 2 blast furnaces is controlled at 150,000 m respectively
3/ h, 200,000 m
3/ h and 150,000 m
3/ h;
3) in burnt groove and lump ore trench bottom awl section lead-ingroove, each groove oven dry is controlled at 7000Nm with flue gas flow to the hot waste gas of No. 1 blast furnace and No. 2 blast furnaces respectively
3/ h;
4) go into the groove hot waste gas,, carry out a series of heat exchange with coke, ore through bed of material gap in 8 meters the groove, thus with coke, ore in the groove with the part mechanical water take out of.
4. the method that the central cooler waste heat recovery is used for Blast Furnace Ore, the oven dry of burnt groove according to claim 3; It is characterized in that: each burnt groove of described step 3) and step 4) and lump ore groove top all are provided with 2 thermometrics; Temperature in the groove is implemented to detect; When temperature in the groove is higher than 170 ℃ of setting values, at blast furnace master-control room display alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105806139A CN101988804B (en) | 2010-12-09 | 2010-12-09 | Device and method for drying blast furnace ores and coke groove by recycling residual heat of circular cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105806139A CN101988804B (en) | 2010-12-09 | 2010-12-09 | Device and method for drying blast furnace ores and coke groove by recycling residual heat of circular cooler |
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| CN101988804A CN101988804A (en) | 2011-03-23 |
| CN101988804B true CN101988804B (en) | 2012-11-14 |
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|---|---|---|---|
| CN2010105806139A Expired - Fee Related CN101988804B (en) | 2010-12-09 | 2010-12-09 | Device and method for drying blast furnace ores and coke groove by recycling residual heat of circular cooler |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103453778B (en) * | 2013-09-03 | 2015-04-01 | 南通曼特威金属材料有限公司 | Waste gas drying system for smelting furnace |
| CN106440874A (en) * | 2016-10-31 | 2017-02-22 | 中冶赛迪工程技术股份有限公司 | Coke drying system and drying method |
| CN111721131A (en) * | 2020-05-13 | 2020-09-29 | 辽宁科技大学 | Energy coupling system based on tail end waste heat recovery and solid heat storage of annular cooler |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200986399Y (en) * | 2006-12-20 | 2007-12-05 | 唐山钢铁股份有限公司 | Prewarming mixture mine slot heater |
| CN101865609A (en) * | 2010-06-18 | 2010-10-20 | 昆明理工大学 | New technique for recovering heat energy of cooling waste gas |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006241536A (en) * | 2005-03-04 | 2006-09-14 | Jfe Steel Kk | Dust collection method for blast furnace ore tank |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200986399Y (en) * | 2006-12-20 | 2007-12-05 | 唐山钢铁股份有限公司 | Prewarming mixture mine slot heater |
| CN101865609A (en) * | 2010-06-18 | 2010-10-20 | 昆明理工大学 | New technique for recovering heat energy of cooling waste gas |
Non-Patent Citations (2)
| Title |
|---|
| JP特开2006-241536A 2006.09.14 |
| 李素杰.宁钢430m~2烧结机工程设计的特点.《矿业工程》.2008,第06卷(第01期), * |
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| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Jia Xiufeng Inventor after: Zhou Ailin Inventor after: Sha Yuduo Inventor after: Yu Guang Inventor after: Li Zhengfu Inventor before: Jia Xiufeng |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: JIA XIUFENG TO: JIA XIUFENG ZHOU AILIN SHA YUDUO YU GUANG LI ZHENGFU |
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